Arma 3 (stylized as ARMA III) is an open-world, tactical shooter video game developed by Czech studio Bohemia Interactive for Microsoft Windows. It was released on September 12, 2013 Arma 3's storyline takes place in the mid-2030s during the fictional Operation Magnitude, a military operation launched by NATO forces fighting in Europe against "Eastern armies" referred to as CSAT (Canton-Protocol Strategic Alliance Treaty) led by a resurgent Iran with a coalition of other Middle Eastern and Asian nations.
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